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| EL__Fairmont |
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cboz wrote: grub73 wrote: Quote: I also cut the shaft that holds the valves' it's in 2 pieces and the valve slots between, I left the side with the thread for the screw I probably wouldn't have thinned the shaft that way, IMO it may have weakened the shaft too much, if the shaft lets go then you could end up with BBM blades/valves loose in the intake and possibly in your engine, Jamming your valves and stuffing your head. There's no chance of it breaking it's very strong material and the screw thread is retained. Though must say it's alot of labour for what I think would be a small gain, hoping to gain a little bit by doing this along with cutting the gasket to size which is pretty rough and fully opening the valves. Cheers I hand the thread back to it's owner after my little hi-jack, lol. cheers, post up your results when finished, good to see you will open up the butterfly valves the full 100%. Will make the most of your BBM mods..
_________________ 97 EL Fairmont 4l OHC .Silver. |
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| SgtBourne |
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whilst i understand those drawings might not be 100% accurate, it appears to me (who knows nothing about physics) that the slight angle would encourage the air to travel around the bend rather than straight on to obstruct the outside line air...
_________________ So much RAM the motherboard twisted off the POST. |
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| EL__Fairmont |
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SgtBourne wrote: whilst i understand those drawings might not be 100% accurate, it appears to me (who knows nothing about physics) that the slight angle would encourage the air to travel around the bend rather than straight on to obstruct the outside line air...
A fully open valve blade will outflow a partially open valve blade. Have a look at this pic of an opened BBM. 
_________________ 97 EL Fairmont 4l OHC .Silver. |
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| EL__Fairmont |
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link to another thread about the same mod!!
http://www.fordforums.com.au/showthread ... ge=1&pp=25
_________________ 97 EL Fairmont 4l OHC .Silver. |
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| Joesau |
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well there you go, thats the thread i started
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| USELESS |
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Do you guys know the diameter of the short runner butterflies and long runner manifold port.?
_________________ 14.77 @92.71mph July 06 14.52@95.68mph July 07 14.241 96.7 MPH in a shoebox/taxi au ford wagon!!Bwahahah still cant believe it!!! |
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| USELESS |
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Looks like no one knows.
_________________ 14.77 @92.71mph July 06 14.52@95.68mph July 07 14.241 96.7 MPH in a shoebox/taxi au ford wagon!!Bwahahah still cant believe it!!! |
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| grub73 |
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manifold port is 40mm, sorry but dont want to pull apart my spare bbm at the moment to check butterfly blades. From a quick look though they look a little smaller, maybe 37-38 mm?? Will check when i have some more time (and a clean workbench
 )
_________________ EF XR6 5spd 14.57@97mph |
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| cboz |
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Shoulda checked mine while it was out, though the butterfly blades are only very marginally smaller than the ports, they are a neat fit.
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| USELESS |
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Thanks guys..that is great info!!:)
_________________ 14.77 @92.71mph July 06 14.52@95.68mph July 07 14.241 96.7 MPH in a shoebox/taxi au ford wagon!!Bwahahah still cant believe it!!! |
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